Automatic feed control for oil-burners



l. L. HOFFMAN.

AUTOMATIC FEED CONTROL FOB OIL BURNEHS.

APPLICATION men JUNE 13. 1916.

1,314,807. Patented Sept. 2,1919.

JNI/ENTOR, j @7'0 650/] Z, Hoffman rm: COLUMBIA PLANOGRAIII c'n.,WASHINGTON, n. c

operate automatically, under the control of.

1 UNITED sT TEs PATENT OFFICE,

JOSEPH It. HOFFMAN, 01? PORTLAND, 'OREGON.

AUTOMATICIEED CONTROL FOR OIL-BURNERS.

My invention relates to automatic feed control for oil burners, and hasfor its principal object to provide a device which will the boilerpressure, for controlling the steam and oil supply to the oil burner.

Another object is to provide a device of simple and practicalconstruction and which can be easily adjusted for the purpose ofregulating the admission of steam, or the admission of oil, or both, tothe burner, as high efficiency may require.

A still further object of the invention is to provide a simpleconnection whereb steam can be discharged through the 011 burner, atwill, for cleaning the same. i

In order that others may understand my invention, I have illustrated onepractical embodiment thereof on the inclosed sheet of drawing which Iwill now describe.

The figure shows a vertical sectional view of one practical embodimentof myinvention,the oil'burner being shown in elevation with a portion ofthe connections thereto broken out to reduce the size of the figure.

Referring now more in detail to the drawing, the invention, as hereillustrated, com- ,prises a main body 1, having therein, atits "up-perend, a steam chamber 2, to which steam is admitted from the steam pi e3. In the lower end of said body is an 011 chamber 4, to which oil isfed through an oil pipe 5. In the middle of said device is a Said rod 8,has a threaded connection with a sleeve 11, connected with a diaphragm12, within a diaphragm casing 13. Mounted above the diaphragm casing isa spring casing 14, within which is mounted a coil spring 15, whichrests at its lower end upon the diaphragm 12, above the sleeve 11, andat its upper end said spring is provided with Specification of LettersPatent.

Patented Sept. 2, 1919.

Application filed June 13, 1916. Serial No. 103,594.

a plate 16, controlled by a set screw .17, in the upper end of'thecasing 14, whereby the tension of the spring 15, downwardly upon thediaphragm 12, can be regulated. A steam pipe 18, is connected with, themiddleportion of thebody 1, and is in open communication with thechamber ,6, formed therein, as clearly illustrated, whereby steam fromthe chamber 2, admitted by the valve 7, to said chamber 6, passes intosaid pipe 18, and to the oil burner. An oil pipe 19, is a mounted withinthe steam pipe18, and is connected through the chamber 6, with thechamber 9, into which the oil passes from the chamber 4, under the:control of the valve 10. A steam pipe 20, is inserted through the wallof the body 1, and into the chamber 9, with its end positioned. todischarge steam into the open end of the oil pipe 19, as clearlyillustrated, said pipe 20,

eing connected in any desired manner with the steam pipe 3, as by meansof a by-pass pipe 21.. This steam pipe 20, also afl'ords an outlet foran operatm 'rod 22, which extends through the device, through the oilpipe 19, to the oil burner 23, in which it is connected to the end valve24, for regulating the discharge from the oil burner. As the oil burnerforms no part of this invention it,

is not shown in detail. The valve rod 8,

is constructed at its lower end, as at 8,to

receive a wrench or other tool, whereby it can be turned into or out ofthe sleeve 11, for the purpose of moving the valves 7 and 10, toward oraway from their seats, in the control of steam and oil from the chambers2 and 4, to the chambers 6 and 9, respec tively. Connected with thediaphragm casing 13, is a pressure pipe 25. This pipe is extended to andconnected with the boiler, whereby the steam pressure within the boileris transmitted into the diaphragm casing 13, underneath the diaphragm12. This pressure operates to flex the diaphragm 12, upwardly againstthe tension of the spring 15, and in doing so moves the valve members 7and 10, into their respective seats, and cuts 01f the steam supply andthe oil supply, in a manner which will be very clear from the drawings.When the steam pressure in the boiler lowers to such an extent that thetension of the spring flexes the diaphragm 12, downwardly, it opens thevalves 7 and 10, and again admits oil and steam to their res ectivepipes. Thus, it will be seen that the device operatesautos-tively,'tosaid oil'burneigvalve members fon controlling theadmission-of oil andsteam, 5

' ed .through sa d; secondfsteam, ando l cha m-r.

100 the oil discharge pipe leading from said matically under the controlof the steam. in L. the boiler to supply steam and oil ,forafuel epurposes. By" regulating the tension of the spring 15, by meansoftheadjustmentscrew, 17, and by adjusting the positions of the, valves7 and 10, relative to their valve seats,

by turning the rod 8,in'vvardly or outwardly, asumay be required, aVBIYIIICGH anda' very accurate adjustment can be had, and a veryefficient automatic regulation of steam' and- I I p nected thereto, an011 chamber WltlLOllI supoil secured. 7

1 am" aware that changes and details "can *be made in the invention ashere illustrated Without- -departing from the spirit thereof,- and I donot, therefore,limit the invention to this particularSllOWlIlg,--XC6pt'2tS I may limited y thehereto appended-claims.Iiclairnz I 1 m y q 1. 'In a device of the character referred to,

in combination 'with a steam boiler andfan oil burner therefor, a casingprovided With oil and: steam chambers therein with supply pipes leadingthereto, respectively, oil and steantpipes from said chambers, respect1vely,- to said oil burner, means for controlling thefiow ofoil andsteam from their re-f spective chambers to said burner, and a steam pipeprojected into the oil chamber "and positioned' for discharging steamat: will through the'oil pipeleadingi-from the oil chamber tothe-burnen; 1 '2. In a device of the characterreferred v to, incombination With'a steam: boiler and an oil burnertherefor, a casing:providedv With. 011 and steam chambers. therein, Wlth' sup-T sat-1dsteamchambers, a second oll chamberl respectively, to said: oil andisteamvpi'pes, a

diaphragm casing Withdiaphragm therein,

operating connections from said diaphragm to both of said valve members,pipe'connec- V i N 4 ated. -devlce, connected 7 w th said valves, vmeans for;supplying 'steana' underpressure 105 tions from said boiler tosaid diaphragm casing, whereby steam pressure from said thereto,whereby'to.vautomaticallycand s boileroperates to move said diaphragm'and simultaneouslyv operates) said valve members, a springoperatin'g'onsald diaphragm 1n; Op: 5

stant-ially ,as-described q' r 8. In adevice ofthecharacter:-referredto,

a casing having oil-land steam chambers therein with supply pipesleadingthereto, discharge pipes leading; therefrom, valve, members Jin'saideasing connected togetherv and wmovable' to control the: .oiland; steamsupply to said discharge pipes, means for automaticallyandsimultaneously, noving said "valve members in the control of theolland steamsupply to sa d' dl-scharge pipes, and a steam pipe insertedinto said casing in posi- 1 tion ,todischarge steam into the oildischarge.

pipe, at will, substantially as described."

,1 4. ,Anautom'atic feed control for oil burners, comprising a casingprovided With a steam chamber Withstea-m'supply pipe con plypipe'co-nnected thereto, aisecond steam chamber vvith discharge pipetherefromwith a valve-controlled communication between: ,1

said:v steam chambers, second oil a chamber Wltll discharge pipetherefromv and valvecontrolled communication between said 011 1chambers,ia steamdischarge pipe inserted through 1 said, second steamand foil chambers oil discharge pipe lea-ding; from said second,

vice connected With saidlvalves, and means for supplying steam. underpressure thereto,

wherebyvto automatically move both-of said, I

valves for controlli-ng the; passage of oil and steam to the respectivedisel iarge'pipes,

substantially as described; I a

5. An automatic feed c011 rol foroil burjm ers,comp-rising"a1casingfiprovided jvvith a d l steam chamber with steamsupply pipe con nected thereto a'n oilchamber With-oil supply pipe:connected-thereto, aseeond steam" chamber With discharge pipetherefronnwith a valve-controlled commun cation between With dischargepipe therefrom and valve controlled communication between saldjoilchambers, a steam discharge pipe ;insert= bersanfd positioned-to:discharge steam into second oil; chamber, steam-pressureopermultaneonslymove said, valves-for control-I lingthe passage? of o l and steam to there-g o spective dischargespipes, andf-aspring with a means for regulatng the ,teHSlOIL thereof, operating in oppositlonito the steam pressurein said device,substantially as described} Signed atlPortland, Multnomahcounty,

comes of this'patentmayp-be ob tained. for. ave ameacii,',b addressing;the commission rs: Patents'jl

